run biodivMapR directly on classification maps

# biodivMapR v1.7.0

## Changes
- capacity to produce diversity maps based on classification raster

## Fixes
- warning eliminated when testing Selected_Features in Lib_MapFunctionalDiversity.R
- Corrected data extraction function using nbands in extract.big_raster and get_random_subset_from_image
- updated extract.big_raster and get_random_subset_from_image in order to account for 2D rasters which cannot be read with brick
- added driver definition when using read_stars (extract.big_raster)
- corrected vignettes (TypePCA used before defined in previous version)

biodivMapR is getting functional

biodivMapR v1.5.1

Fixes

• Fixed bug occuring when writing image if initial raster is not a multiple of the window size. no bug occur but the raster files have wrong information
• fixed problem when performing estimation of biodiversity for plots outside of the raster: now the value is NA

biodivMapR v1.5.0

Changes

• implemented MNF for dimensionality reduction
• discarded HDR as input variable from get_random_subset_from_image
• updated example file
• added contribution of F de Boissieu
• changed email address to teledetection.fr
• updated diversity_from_plots
• updated example script
• Added functional diversity metrics
• updated example script
• updated vignette

includes stars and reads any file format as input

biodivMapR v1.3.0

Changes

• integrated stars package in order to read any file format, including TIFF format
• developed a generic function to write rasters
• prepared for MNF
• changed default red band for the computation of NDVI: closest band to 690 nm is now selected instead of closest band to 700 nm

biodivMapR v1.2.0

Fixes

• fixed bug raised when processing data over large number of pixels (image products >2^31 bits)
• fixed bug by adding elimination of bands disturbed by water vapor even when ContinuumRemoval set to FALSE

Changes

• Changed name of default directory when saving image after calling raster2BIL
• added documentation for raster data conversion using raster2BIL

biodivMapR v1.1.0

Fixes

• fixed bug in Lib_MapSpectralSpecies: remove constant bands from Subset$DataSubset if needed
• fix bug when continuum removal applied on pixels with constant values which were not filtered in previous stages

Changes

• Updated continuum removal
• Named Continuum_Removal instead of CR
• corrected documetation for perform_radiometric_filtering
• Added an error report when spectral information is not conform with expectations (due to too high noise level for example, usually leading to NaN or Inf values after PCA)
• Changed name for some variables in internal functions for consistency
• will add documentation on how to analyze error reports